InspiteofallstoriesofprosperityintheUnitedStates,notonlydoespovertyexistthere,butcrimesofvarioustypeshavebeenincreasingatanalarmingrate．Mostactsofviolencewerecommittedbyyoungpeople．57%ofthecriminalsarrestedin1979wereyouthsbelow25ofage． Everyoneagreesthatcrimeispartlyaresultofbadmaterialconditions:poverty,lackofeducation,livingwithoutasettledhome,beingparentless,sufferingsfromotherkindsofmisfortune,etc． Therearealsootherfactorsthanmaterialconditionswhichareresponsibleforthesharpincreaseofcrimerate．Inthefirstplace,somestatelawsprovideadeathpenaltybutsomenot．Secondly,theConstitutionallowseverycitizentocarryweaponsforhisownprotection．Itisthereforepossibleandeasyforanyoneinthecountrytogetagun．Finally,therehasbeentoomuchshownonTVandtoomuchreportedinnewspaperofallkindsofcrime,thedetailsofwhicharesoaccuratelydescribedthatevenchildrenknowhowtoduplicatewhattheyhaveseenorread． Allthesehaveresultedinahighfrequencyofcrimescommittedbothbyprofessionalcriminalsandbynonprofessionalonesinmurder,drugsmuggling,robbery,etc． ?Theauthorintendstotellthereadersthat__________．
A.the United States is a wealthy country although poverty and crime exist there
B.crime has become a serious problem in the United States, although it is said to be a prosperous one
C.despite the fact that crimes have been increasing rapidly in the United States, it is a country of prosperity
D.in spite of stories about poverty and crime in the United States, it is prospering at an increasing rate
正确答案是B